“Rocky Marciano was my great grandfather’s all-time favorite fighter, which was passed down to all of us in the Marcellino family." Marcellino said in a statement. "The Marcellinos and the Marcianos have truly become family during the development of this project, and we are honored to tell this generation about a man, a son, a brother, a husband and a father who rose up out of the streets of Brockton to change the world in his generation."

Marciano was the only undefeated heavyweight champion in history.

“My father is still counted as one of the greatest heavyweight fighters of all time, and if he were alive today he would be proud that we are working to bring the true story of his life to the big screen," Rocky Marciano Jr. said in a statement. "I am thrilled that the Marciano family; together with City of Peace films, is working on a movie that will tell the story about my father...the real Rocky story."